Separation of dry materials



Sept 13, 1932 K. c. APPLEYARD ET AL 1,876,825

SEPARATION oF DRY MATERIALS Filed Jan. 4. 1929' Y material will flow evenly toward the taill U c .1 raras rari-Er KENmM CHARLES ArrLnYAnD,Y or BIRTLEY, ooLIN WrnLrAM HIGfHAM eiomvrnsy oF Dow Farm, Aann ivon LLOYD isnegawiinn oF .Brarnmg ENGLAND, AssIGNonsorf ONE-FOURTH ro uns ernennt IRON coMPaNn minimun, or BIRTLEY, ENGLAND 'sEraRarioNer DRLY MATERIALS' 'Y Application inea January i, 1929, serial No. 330,365, and itA eeatiiritainjianuary 24,' 1912s.

This invention relates Vto the separation of dry materials. 1t is particularly directed to the'separation of slate or other impurities or refuse from coal, but it is not limited thereto, and includes the cleaning and grading of agricultural and mineral products and the like generally.

rThe invention will be described herein mainly with reference to the cleaning of coal.

The object ofthe invention is to provide an improved apparatus for this purpose.

In previous apparatus the deck riiiies, at least as regards the principal part of the riflffies, were disposed either across the table or when longitudinal of the table they were parallel to the tailing riffles.

The present invention consistsiin the employment of rifllesl inclined at an acute angle to the tailing riflle the angle not necessarily being uniform throughout the-length of the tailing riifle or riflies.

The invention also consists in the employment of desk 'riffles decreasing in height fromv or towards the tailing rifie in order that the ing riffle.

r1`he invention further consists'in the employment of riifles of substantially even height across the table.

The invention also consists in the improvements in and relating to the-separation of dry materials hereinafter described.

Referring now to the accompanying diagrammatic drawing Y Figure 1 illustratesthe plan ofa deck or table according to one form of the present invention. Y

Figure 2 is a section on the line 2-2 of Figure 1 looking in the direction of the ar-` rows. Y

Figure 3 is a section on the line 3--3 of Figure 1 looking in the direction of the arrows.

Figure 4 is a section on the line 444 of Figure 1` looking in the direction of the` arrows.

Figure 5 is a section onthe line 5-5 of Figure 1 looking in the direction of the arrows.

Figures 6 and 7 are sectional views showing VVdierent Y arrangements of riiles, and are to bey regarded as taken on line ',4-4 of V, Incarrying theinventioniinto effect in Vthe form illustrated with reference to ,Fig-

uresl to V5 by way'ofexample, the deck or tableais providedwith bankingbars b and. c, rifHzes Zand-e, tailing rililessf and g, lfeed end In, and delivery endy z', saidbanking bars, as customary, beingof greaterheight than the tailingrililes. y

rEhe deck riftles e offtheufeed.orfprelimin aryseCtiOn are arranged atan angle to the tailing riflie ofabout10", the angleof inclination,v la ofthe tailingV riifle g to the horizontal, line Z` lioiningivthe front end m yof the feed sectionwith the end n of the delivery section being` about 12 in the form illustrated. The tailing riffie f of the concentrating area or delivery section is inclinedl at an angle of about .in the form shown to the line n. Y

The deck-rimes d of the concentrating area as shown make varying angles with the trailing' riffle f, the inclination being from about 50 to 40, the riffles making the smaller angles being those nearest to the delivery end n.

rhe rifles Z are shown curved, references to V*curved riies are to be found in our co-pending application Serial No. 330,364, filed Jan- KCE uary 4, 1929. r1`he riftles e may also be curved throughout the whole or part of their length,

making suitable equal or varying angles with the tailing riiile g. yV

The connections of the riffles d, to the riiiles e should preferably be such as to avoid sudden changesor brakes in the movement of the coal or the like.

The above description may be taken as applying to one half of a Duplex table. With a Duplex table a banking bar c is not necessarily required. 1n what may be termed the half table or a single table such as that shown in Figure 1 where a banking bar c is used, this may be curved. Reference to curved Y banking vbars and other matters which may be used in connection with the present application is to be found in our co-pending applica- 'VW l tion.

The invention may be applied to tables in which separation is eliected by means of vibration plus air pressure, and to those cases Where no vibration is employed. It may also be applied in connection with separation or stratification by air pressure, Where air is employed for the purpose of loosening the bed of coal or the like, sometimescalled static pressure,or Where separation lis efected in part or substantially by the velocity of the air. Having noW described our invention What We claim as new and desire to secure by Letters Patent is In a device of the'class described comprising an elongated table having a preliminary feed section and a concentrating section, a banking bar and a tailing riHe eXtending along the longitudinal edges of the table, the feed section having groups of straight riiles thereon extending diagonally across the table and disposed in acute angular relation with respectrto the tailingriiiie, and a group of curved rilesupon the concentrating'section and extending ina substantially longitudinal direction of the table and disposed in acute angular relation With respect to the tailing riie, the riles of the concentrating section varying in angularity.

In testimony whereof we have names to this specification.

KENELM CHARLES APPLEYARD. Y COLIN WILLIAM HIGHAM HOLMES. IVOR LLOYD BRAMWELL.

signed our 

